How to throw meaningful data in exceptions ?
- by ZeroCool
I would like to throw exceptions with meaningful explanation !
I thought of using variable arguments worked fine but lately I figured out it's impossible to extend the class in order to implement other exception types. So I figured out using an std::ostreamstring as a an internal buffer to deal with formatting ... but doesn't compile!
I guess it has something to deal with copy constructors.
Anyhow here is my piece of code:
class Exception: public std::exception {
public:
Exception(const char *fmt, ...);
Exception(const char *fname,
const char *funcname, int line, const char *fmt, ...);
//std::ostringstream &Get() { return os_ ; }
~Exception() throw();
virtual const char *what() const throw();
protected:
char err_msg_[ERRBUFSIZ];
//std::ostringstream os_;
};
The variable argumens constructor can't be inherited from! this is why I thought of std::ostringstream!
Any advice on how to implement such approach ?
